Chelsea, 17, and Amber Dubois, 14, of Escondido were kidnapped, raped and murdered in separate incidents by sex offender John Gardner, who confessed and is now serving life in prison.

The Kings said Fletcher was tenacious in getting the law passed and worked to bring all sides of the political spectrum together on the issue.

“Nathan stood up and fought for something so critical, not just for our family, but for the community,” Kelly King said.

The law, created in response to those murders, creates enhanced sentencing for predators who commit forcible sex crimes against children, including the “one strike” possibility of life in prison without parole for the most egregious crimes. It also mandates GPS and lifetime parole monitoring and creates zones that prohibit offenders from visiting places where children gather.

Fletcher joined the Kings for the announcement at Spanish Landing on San Diego Bay.

Fletcher is considered one of the four major candidates for mayor. The others are San Diego City Councilman Carl DeMaio and District Attorney Bonnie Dumanis, both Republicans, and Rep. Bob Filner, a Democrat.

Fletcher is not the only mayoral candidate getting nods from prominent figures this week.

Dumanis has received endorsements from San Diego County Public Defender Henry Coker and former Assemblywoman Charlene Zettel in the past week.